Boot Disc + Snow Leopard Retail wont boot?

[trumansnare]

Hello,

I am trying to install Snow Leopard Retail on my PC.

 

Intel i7 930

9GB DDR3

NVIDIA GTX 460

Asus Rampage III Gene

500gb HD, 1tb HD

 

I am using the newest BOOT-123 disc.

 

 

I Start my computer and boot the BOOT-123 disc. The Darwin prompt appears. I eject the disc, and pop in the full retail snow leopard. I press enter. It asks me for the boot device number (80,81)

 

When I type 80 (which is my primary Hard drive, with windows installed) it just starts loading windows, and never boots the retail disc.

When I type 81 (secondary HDD)

Then it tells me that the Boot MGR is missing to restart. Which makes sense because I don't have a bootmgr on that drive.

 

I don't get why it starts windows instead of booting the retail disc.

 

Has anyone had this happen to them?

 

Thanks in advance